preciso tambem de gráficos
Ola True
a)
x^2 + 2x = 0
x*(x + 2) = 0
x1 = 0
x2 = -2
b)
x^2+7x+10 = 0
d^2 = 49 - 4*10 = 49 - 40 = 9
d = 3
x1 = (-7 + 3)/2 = -2
x2 = (-7 - 3)/2 = -5
c)
4 - x^2 = 0
x^2 = 4
x1 = 2
d)
2x^2 - 3x + 4 = 0
d^2 = (-3)^2 - 4*2*4
d^2 = 9 -32
delta negativo não existe raiz real
e)
x^2 + 2x + 1 = 0
(x + 1) = 0
x = -1
f)
-x^2 + 2x - 1 = 0
x^2 - 2x + 1 = 0
(x - 1)^2 = 0
x = 1
g)
x^2 - 2x + 4 = 0
(x - 2)^2 = 0
x = 2
pronto
numsei
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Answers & Comments
Verified answer
Ola True
a)
x^2 + 2x = 0
x*(x + 2) = 0
x1 = 0
x2 = -2
b)
x^2+7x+10 = 0
d^2 = 49 - 4*10 = 49 - 40 = 9
d = 3
x1 = (-7 + 3)/2 = -2
x2 = (-7 - 3)/2 = -5
c)
4 - x^2 = 0
x^2 = 4
x1 = 2
x2 = -2
d)
2x^2 - 3x + 4 = 0
d^2 = (-3)^2 - 4*2*4
d^2 = 9 -32
delta negativo não existe raiz real
e)
x^2 + 2x + 1 = 0
(x + 1) = 0
x = -1
f)
-x^2 + 2x - 1 = 0
x^2 - 2x + 1 = 0
(x - 1)^2 = 0
x = 1
g)
x^2 - 2x + 4 = 0
(x - 2)^2 = 0
x = 2
pronto
numsei